Stretch composites and methods of making the composites
First Claim
1. A stretch composite comprising:
- an extensible first substrate having one or more first thermoplastic elastomeric members disposed on at least a portion of the substrate to form a first elasticized region,wherein the first thermoplastic elastomeric member comprises a thermoplastic elastomer and a phase change solvent having the general formula;
R′
-Ly-(Q-Lx)n-1-Q-Ly-R;
(I)
R′
-Ly-(Q-Lx)n-R;
(II)
R′
-(Q-Lx)n-R;
(III)
R′
-(Q-Lx)n-1-Q-Ly-R;
(IV)
R′
-(Q-Lx)n-1-Q-R;
or
(V)a mixture thereof;
wherein Q is a para-ring substituted difunctional aromatic moiety, and wherein the substitutions are in the 1,4 positions;
L is CH2;
R and R′
are the same or different and are independently selected from H, CH3, COOH, CONHR1, CONR1R2, NHR3, NR3R4, hydroxy, or C1-C30 alkoxy;
wherein R1, R2, R3 and R4 are the same or different and are independently selected from H or linear or branched alkyl from C1-C30;
x is an integer from 1 to 30;
y is an integer from 1 to 30; and
n is an integer from 1 to 7;
wherein the phase change solvent has a phase change in a temperature range from 40°
C. to about 250°
C.; and
wherein the first thermoplastic elastomeric member has an average width greater than about 0.2 mm.
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Abstract
A stretch composite having one or more elastomeric members disposed on at least one region of an extensible fibrous substrate to provide stretch properties to a targeted region of the substrate. The composite has been incrementally stretched to at least partially break up the structure of the substrate in order to reduce its resistance to stretch. The stretch composites are useful for disposable and durable articles, such as disposable absorbent articles including diapers, pull-on diapers, training pants, incontinence briefs, catamenial garments, baby bibs, and the like, and durable articles like garments including sportswear, outerwear and the like. Also disclosed are methods of forming such stretch composites.
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Citations
21 Claims
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1. A stretch composite comprising:
-
an extensible first substrate having one or more first thermoplastic elastomeric members disposed on at least a portion of the substrate to form a first elasticized region, wherein the first thermoplastic elastomeric member comprises a thermoplastic elastomer and a phase change solvent having the general formula;
R′
-Ly-(Q-Lx)n-1-Q-Ly-R;
(I)
R′
-Ly-(Q-Lx)n-R;
(II)
R′
-(Q-Lx)n-R;
(III)
R′
-(Q-Lx)n-1-Q-Ly-R;
(IV)
R′
-(Q-Lx)n-1-Q-R;
or
(V)a mixture thereof; wherein Q is a para-ring substituted difunctional aromatic moiety, and wherein the substitutions are in the 1,4 positions;
L is CH2;
R and R′
are the same or different and are independently selected from H, CH3, COOH, CONHR1, CONR1R2, NHR3, NR3R4, hydroxy, or C1-C30 alkoxy;
wherein R1, R2, R3 and R4 are the same or different and are independently selected from H or linear or branched alkyl from C1-C30;
x is an integer from 1 to 30;
y is an integer from 1 to 30; and
n is an integer from 1 to 7;
wherein the phase change solvent has a phase change in a temperature range from 40°
C. to about 250°
C.; andwherein the first thermoplastic elastomeric member has an average width greater than about 0.2 mm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 14, 16, 17, 18)
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11. A stretch composite comprising:
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an extensible fibrous substrate having a plurality of first thermoplastic elastomeric members disposed on a first elasticized region; and
a plurality of second thermoplastic elastomeric members disposed on a second elasticized region;wherein the first and the second thermoplastic elastomeric members differ in a property selected from the group consisting of elasticity, melt viscosity, composition, shape, pattern, add-on level, and combinations thereof; wherein the first thermoplastic elastomeric member comprises a thermoplastic elastomer and a phase change solvent having the general formula;
R′
-Ly-(Q-Lx)n-1-Q-Ly-R;
(I)
R′
-Ly-(Q-Lx)n-R;
(II)
R′
-(Q-Lx)n-R;
(III)
R′
-(Q-Lx)n-1-Q-LyR;
(IV)
R′
-(Q-Lx)n-1-Q-R;
or
(V)a mixture thereof; wherein Q is a para-ring substituted difunctional aromatic moiety, and wherein the substitutions are in the 1,4 positions;
L is CH2;
R and R′
are the same or different and are independently selected from H, CH3, COOH, CONHR1, CONR1R2, NHR3, NR3R4, hydroxy, or C1-C30 alkoxy;
wherein R1, R2, R3 and R4 are the same or different and are independently selected from H or linear or branched alkyl from C1-C30;
x is an integer from 1 to 30;
y is an integer from 1 to 30; and
n is an integer from 1 to 7;
wherein the phase change solvent has a phase change in a temperature range from 40°
C. to about 250°
C.; andwherein at least a portion of the composite within the first or the second elasticized region has been incrementally stretched resulting in permanent elongation of the substrate in said portion. - View Dependent Claims (12, 15, 19, 20, 21)
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Specification